“But the incident had all the earmarks of the three waves of denial-of-service attacks that have bedeviled U.S. financial institutions, including stock brokerages, since last September,” Acohido reports. “‘My first thought is that it is a denial-of-service attack, but I’m not sure,’ says Gartner banking security analyst Avivah Litan. ‘It’s a very attractive target. It’s very visible, and that’s what these Iranian state attacks are all about, making a political statement by disrupting a visible website.'”
Acohido reports, “The first wave of denial-of-service attacks attributed to the Cyber Fighters of Izz ad-Din al-Qassam began last September and lasted about six weeks. Knocked offline for various periods of time were Wells Fargo, U.S. Bank, Bank of America, JPMorgan Chase & Co. and PNC Bank. The second wave commenced in December and lasted seven weeks, knocking out mid-tier banks and credit unions. And a third wave of high-powered denial-of-service attacks commenced in March targeting credit card companies and financial brokerages. ‘I don’t have any inside knowledge, but I think this one (Nasdaq) is political, as well,’ Litan says.”
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